diff --git a/modules/customer-invoices/src/api/domain/proformas/services/proforma-compute-tax-groups.ts b/modules/customer-invoices/src/api/domain/proformas/services/proforma-compute-tax-groups.ts
index e01dfedf..9300d9b5 100644
--- a/modules/customer-invoices/src/api/domain/proformas/services/proforma-compute-tax-groups.ts
+++ b/modules/customer-invoices/src/api/domain/proformas/services/proforma-compute-tax-groups.ts
@@ -1,7 +1,7 @@
 import type { Tax, TaxPercentage } from "@erp/core/api";
 import { Maybe } from "@repo/rdx-utils";
 
-import { type InvoiceAmount, ItemAmount } from "../../common";
+import { ItemAmount } from "../../common";
 import type { IProformaItems } from "../entities";
 
 type TaxGroupState = {
@@ -13,11 +13,11 @@ type TaxGroupState = {
 
   recCode: Maybe<string>;
   recPercentage: Maybe<TaxPercentage>;
-  recAmount: InvoiceAmount;
+  recAmount: ItemAmount;
 
   retentionCode: Maybe<string>;
   retentionPercentage: Maybe<TaxPercentage>;
-  retentionAmount: InvoiceAmount;
+  retentionAmount: ItemAmount;
 };
 
 /**